Esphome xiao base

0rax·esphome-xiao-base·pcb/pcb.kicad_pcb

About the Esphome xiao base PCB

Esphome xiao base is an open source RP2040/RP2350 PCB design by 0rax, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 40 × 30 mm, with 6 components from 4 distinct parts.

Its main chip is the XIAO-ESP32, from the RP2040/RP2350 family. By type, the board carries 3 switches, 2 connectors and 1 IC.

It belongs with the iot & wireless, sensors and displays & leds designs in this gallery.

From the project

XIAO base board PCB & configuration for ESPHome based sensors.

The ESPHome XIAO Base is a custom PCB designed to be used with the ESPHome firmware as a base for creating new sensors.

It was made as a carrier board for the XIAO series of microcontrollers with an OLED display and three switches while providing an easy-to-access header on the back for standard communication protocols (I²C, UART and SPI).

A cutout has also been left for the underside of the XIAO to allow access to the battery pads available on the underside of some modules (such as the [XIAO ESP32C6]).

Main components on the Esphome xiao base

XIAO-ESP32

Esphome xiao base bill of materials (BOM)

6 components, 4 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	XIAO-ESP32	MCU_XIAO-RP2040	U1
1	PINHD_1x4_Male	OLED_SSD1306_128x32_0.91inch_I2C	J1
1	Conn_02x06_Odd_Even	PinHeader_2x06_P2.54mm_Vertical	J2
3	SW_Push	SW_PUSH_6mm	SW1, SW2, SW3

Esphome xiao base design files

The KiCad project lives in the 0rax/esphome-xiao-base repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/pcb.kicad_pcb
Schematicpcb/pcb.kicad_sch
BOMoutput/fabrication/jlcpcb/pcb_bom_jlcpcb.csv

Esphome xiao base: common questions

What microcontroller does the Esphome xiao base use?

The Esphome xiao base is built around the XIAO-ESP32, from the RP2040/RP2350 family.

How big is the Esphome xiao base PCB?

The Esphome xiao base measures 40 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Esphome xiao base?

6 components, from 4 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Esphome xiao base design files?

From the 0rax/esphome-xiao-base repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Esphome xiao base design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which 0rax chose for the repository.

Can I test firmware for the Esphome xiao base without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.